Skip Content

Want to pay an invoice? Please call us at 1-800-GRAINGER (1-800-472-4643).

Filter Results By

Applied Filters

Clear All

Flow Switches

40 Results Found that Include 40 Products

Results per page:  16 | 32 | 48
1 MNPT Standard Flow Flow Switch, 2.5 gpm to 760
1 Industrial Flow Switch, Flow Increase 4.5 to 9.5 gpm
1 MNPT   General Purpose Switch,
  • MCDONNELL & MILLER
  • 1 MNPT General Purpose Switch, 1 MNPT General Purpose Switch,
  • Item # 2RUL3
  • Mfr. Model # FS251
  • General Purpose Switch, Min. Flow Rate 5.8 GPM, Max. Flow GPM 131, Connection Size (In.) 1 NPT, Switch...More

3/8 MNPT Piston Liquid Flow Switch, 0.15 gpm
  • GEMS SENSORS
  • 3/8 MNPT Piston Liquid Flow Switch, 0.15 gpm 3/8 MNPT Piston Liquid Flow Switch, 0.15 gpm
  • Item # 1ALV7
  • Mfr. Model # FS-380 181130
  • Liquid Flow Switch, Piston, Flow Rate 0.15 GPM, Connection Size (In.) 3/8 MNPT, Min. Ambient Temp. -20 F,...More

1/4 FNPT Piston Liquid Flow Switch, 0.25 gpm
  • GEMS SENSORS
  • 1/4 FNPT Piston Liquid Flow Switch, 0.25 gpm 1/4 FNPT Piston Liquid Flow Switch, 0.25 gpm
  • Item # 1ALG3
  • Mfr. Model # FS-927 70821
  • Liquid Flow Switch, Piston, Flow Rate 0.25 GPM, Connection Size (In.) 1/4 FNPT, Min. Ambient Temp. -20 F,...More

3/8 MNPT Piston Liquid Flow Switch, 1 gpm
  • GEMS SENSORS
  • 3/8 MNPT Piston Liquid Flow Switch, 1 gpm 3/8 MNPT Piston Liquid Flow Switch, 1 gpm
  • Item # 1ALY1
  • Mfr. Model # FS-380 168434
  • Liquid Flow Switch, Piston, Flow Rate 1 GPM, Connection Size (In.) 3/8 MNPT, Min. Ambient Temp. -20 F, Max....More

1/2 MNPT Piston Liquid Flow Switch, 0.5 gpm
  • GEMS SENSORS
  • 1/2 MNPT Piston Liquid Flow Switch, 0.5 gpm 1/2 MNPT Piston Liquid Flow Switch, 0.5 gpm
  • Item # 4JPJ1
  • Mfr. Model # FS-150 NC 0.5GPM
  • Liquid Flow Switch, Piston, Flow Rate 0.5 GPM, Connection Size (In.) 1/2 MNPT, Switch Enclosure...More

3/4 FNPT Shuttle Liquid Flow Switch, 5 gpm
  • GEMS SENSORS
  • 3/4 FNPT Shuttle Liquid Flow Switch, 5 gpm 3/4 FNPT Shuttle Liquid Flow Switch, 5 gpm
  • Item # 1ALA7
  • Mfr. Model # FS-500 170235
  • Liquid Flow Switch, Shuttle, Flow Rate 5 GPM, Connection Size (In.) 3/4 FNPT, Max. Ambient Temp. 212 F, Max....More

3/8 MNPT Piston Liquid Flow Switch, 0.5 gpm
  • GEMS SENSORS
  • 3/8 MNPT Piston Liquid Flow Switch, 0.5 gpm 3/8 MNPT Piston Liquid Flow Switch, 0.5 gpm
  • Item # 1ALV9
  • Mfr. Model # FS-380 168433
  • Liquid Flow Switch, Piston, Flow Rate 0.5 GPM, Connection Size (In.) 3/8 MNPT, Min. Ambient Temp. -20 F, Max....More

3/4 FNPT Shuttle Liquid Flow Switch, 0.25 gpm
  • GEMS SENSORS
  • 3/4 FNPT Shuttle Liquid Flow Switch, 0.25 gpm 3/4 FNPT Shuttle Liquid Flow Switch, 0.25 gpm
  • Item # 1AKZ8
  • Mfr. Model # FS-500 170231
  • Liquid Flow Switch, Shuttle, Flow Rate 0.25 GPM, Connection Size (In.) 3/4 FNPT, Max. Ambient Temp. 212 F,...More

3/4 FNPT Shuttle Liquid Flow Switch, 0.5 gpm
  • GEMS SENSORS
  • 3/4 FNPT Shuttle Liquid Flow Switch, 0.5 gpm 3/4 FNPT Shuttle Liquid Flow Switch, 0.5 gpm
  • Item # 1ALA1
  • Mfr. Model # FS-500 170232
  • Liquid Flow Switch, Shuttle, Flow Rate 0.5 GPM, Connection Size (In.) 3/4 FNPT, Max. Ambient Temp. 212 F,...More

3/8 MNPT Piston Liquid Flow Switch, 0.25 gpm
  • GEMS SENSORS
  • 3/8 MNPT Piston Liquid Flow Switch, 0.25 gpm 3/8 MNPT Piston Liquid Flow Switch, 0.25 gpm
  • Item # 1ALV8
  • Mfr. Model # FS-380 168432
  • Liquid Flow Switch, Piston, Flow Rate 0.25 GPM, Connection Size (In.) 3/8 MNPT, Min. Ambient Temp. -20 F,...More

1/4 FNPT Piston Liquid Flow Switch, 0.1 gpm
  • GEMS SENSORS
  • 1/4 FNPT Piston Liquid Flow Switch, 0.1 gpm 1/4 FNPT Piston Liquid Flow Switch, 0.1 gpm
  • Item # 1ALG2
  • Mfr. Model # FS-927 70820
  • Liquid Flow Switch, Piston, Flow Rate 0.1 GPM, Connection Size (In.) 1/4 FNPT, Min. Ambient Temp. -20 F, Max....More

3/4 FNPT Shuttle Liquid Flow Switch, 1 gpm
  • GEMS SENSORS
  • 3/4 FNPT Shuttle Liquid Flow Switch, 1 gpm 3/4 FNPT Shuttle Liquid Flow Switch, 1 gpm
  • Item # 1ALA3
  • Mfr. Model # FS-500 170233
  • Liquid Flow Switch, Shuttle, Flow Rate 1 GPM, Connection Size (In.) 3/4 FNPT, Max. Ambient Temp. 212 F, Max....More

1/4 FNPT Piston Liquid Flow Switch, 0.5 gpm
  • GEMS SENSORS
  • 1/4 FNPT Piston Liquid Flow Switch, 0.5 gpm 1/4 FNPT Piston Liquid Flow Switch, 0.5 gpm
  • Item # 1ALG4
  • Mfr. Model # FS-927 70822
  • Liquid Flow Switch, Piston, Flow Rate 0.5 GPM, Connection Size (In.) 1/4 FNPT, Min. Ambient Temp. -20 F, Max....More

1/2 MNPT Piston Liquid Flow Switch, 0.5 gpm
  • GEMS SENSORS
  • 1/2 MNPT Piston Liquid Flow Switch, 0.5 gpm 1/2 MNPT Piston Liquid Flow Switch, 0.5 gpm
  • Item # 4JPH9
  • Mfr. Model # FS-150 NO 0.5GPM
  • Liquid Flow Switch, Piston, Flow Rate 0.5 GPM, Connection Size (In.) 1/2 MNPT, Switch Enclosure...More

3/4 FNPT Shuttle Liquid Flow Switch, 2.5 gpm
  • GEMS SENSORS
  • 3/4 FNPT Shuttle Liquid Flow Switch, 2.5 gpm 3/4 FNPT Shuttle Liquid Flow Switch, 2.5 gpm
  • Item # 1ALA5
  • Mfr. Model # FS-500 170234
  • Liquid Flow Switch, Shuttle, Flow Rate 2.5 GPM, Connection Size (In.) 3/4 FNPT, Max. Ambient Temp. 212 F,...More

1/2 MNPT Piston Liquid Flow Switch, 3 gpm
  • GEMS SENSORS
  • 1/2 MNPT Piston Liquid Flow Switch, 3 gpm 1/2 MNPT Piston Liquid Flow Switch, 3 gpm
  • Item # 4JPJ5
  • Mfr. Model # FS-150 NO 3.0GPM
  • Liquid Flow Switch, Piston, Flow Rate 3.0 GPM, Connection Size (In.) 1/2 MNPT, Switch Enclosure...More

1/2 MNPT Piston Liquid Flow Switch, 1 gpm
  • GEMS SENSORS
  • 1/2 MNPT Piston Liquid Flow Switch, 1 gpm 1/2 MNPT Piston Liquid Flow Switch, 1 gpm
  • Item # 4JPJ2
  • Mfr. Model # FS-150 NO 1.0GPM
  • Liquid Flow Switch, Piston, Flow Rate 1.0 GPM, Connection Size (In.) 1/2 MNPT, Switch Enclosure...More

9/16-18 UNF Piston Liquid Flow Switch, 0.75 gpm
  • GEMS SENSORS
  • 9/16-18 UNF Piston Liquid Flow Switch, 0.75 gpm 9/16-18 UNF Piston Liquid Flow Switch, 0.75 gpm
  • Item # 1ALD2
  • Mfr. Model # FS-4 122355
  • Liquid Flow Switch, Piston, Flow Rate 0.75 GPM, Connection Size (In.) 9/16-18 UNF, Max. Ambient Temp. 225 F,...More

1/4 FNPT Piston Liquid Flow Switch, 0.75 gpm
  • GEMS SENSORS
  • 1/4 FNPT Piston Liquid Flow Switch, 0.75 gpm 1/4 FNPT Piston Liquid Flow Switch, 0.75 gpm
  • Item # 1ALG5
  • Mfr. Model # FS-927 70823
  • Liquid Flow Switch, Piston, Flow Rate 0.75 GPM, Connection Size (In.) 1/4 FNPT, Min. Ambient Temp. -20 F,...More

9/16-18 UNF Piston Liquid Flow Switch, 0.5 gpm
  • GEMS SENSORS
  • 9/16-18 UNF Piston Liquid Flow Switch, 0.5 gpm 9/16-18 UNF Piston Liquid Flow Switch, 0.5 gpm
  • Item # 1ALD1
  • Mfr. Model # FS-4 122354
  • Liquid Flow Switch, Piston, Flow Rate 0.5 GPM, Connection Size (In.) 9/16-18 UNF, Max. Ambient Temp. 225 F,...More

1/4 FNPT Piston Liquid Flow Switch, 1.5 gpm
  • GEMS SENSORS
  • 1/4 FNPT Piston Liquid Flow Switch, 1.5 gpm 1/4 FNPT Piston Liquid Flow Switch, 1.5 gpm
  • Item # 1ALJ4
  • Mfr. Model # FS-927 70831
  • Liquid Flow Switch, Piston, Flow Rate 1.5 GPM, Connection Size (In.) 1/4 FNPT, Min. Ambient Temp. -20 F, Max....More

1/4 FNPT Piston Liquid Flow Switch, 1 gpm
  • GEMS SENSORS
  • 1/4 FNPT Piston Liquid Flow Switch, 1 gpm 1/4 FNPT Piston Liquid Flow Switch, 1 gpm
  • Item # 1ALJ3
  • Mfr. Model # FS-927 70830
  • Liquid Flow Switch, Piston, Flow Rate 1 GPM, Connection Size (In.) 1/4 FNPT, Min. Ambient Temp. -20 F, Max....More

1/4 FNPT Piston Liquid Flow Switch, 1.5 gpm
  • GEMS SENSORS
  • 1/4 FNPT Piston Liquid Flow Switch, 1.5 gpm 1/4 FNPT Piston Liquid Flow Switch, 1.5 gpm
  • Item # 1ALG7
  • Mfr. Model # FS-927 70825
  • Liquid Flow Switch, Piston, Flow Rate 1.5 GPM, Connection Size (In.) 1/4 FNPT, Min. Ambient Temp. -20 F, Max....More

1/4 FNPT Piston Liquid Flow Switch, 0.75 gpm
  • GEMS SENSORS
  • 1/4 FNPT Piston Liquid Flow Switch, 0.75 gpm 1/4 FNPT Piston Liquid Flow Switch, 0.75 gpm
  • Item # 1ALJ2
  • Mfr. Model # FS-927 70829
  • Liquid Flow Switch, Piston, Flow Rate 0.75 GPM, Connection Size (In.) 1/4 FNPT, Min. Ambient Temp. -20 F,...More

1/4 FNPT Piston Liquid Flow Switch, 0.5 gpm
  • GEMS SENSORS
  • 1/4 FNPT Piston Liquid Flow Switch, 0.5 gpm 1/4 FNPT Piston Liquid Flow Switch, 0.5 gpm
  • Item # 1ALJ1
  • Mfr. Model # FS-927 70828
  • Liquid Flow Switch, Piston, Flow Rate 0.5 GPM, Connection Size (In.) 1/4 FNPT, Min. Ambient Temp. -20 F, Max....More

1 Industrial Flow Switch, Flow Increase 4.5 to 9.5 gpm
9/16-18 UNF Piston Liquid Flow Switch, 1.5 gpm
  • GEMS SENSORS
  • 9/16-18 UNF Piston Liquid Flow Switch, 1.5 gpm 9/16-18 UNF Piston Liquid Flow Switch, 1.5 gpm
  • Item # 1ALD4
  • Mfr. Model # FS-4 122357
  • Liquid Flow Switch, Piston, Flow Rate 1.5 GPM, Connection Size (In.) 9/16-18 UNF, Max. Ambient Temp. 225 F,...More

3/4 FNPT Shuttle Liquid Flow Switch, 2 gpm
  • GEMS SENSORS
  • 3/4 FNPT Shuttle Liquid Flow Switch, 2 gpm 3/4 FNPT Shuttle Liquid Flow Switch, 2 gpm
  • Item # 1ALA4
  • Mfr. Model # FS-500 175117
  • Liquid Flow Switch, Shuttle, Flow Rate 2 GPM, Connection Size (In.) 3/4 FNPT, Max. Ambient Temp. 212 F, Max....More

1/4 FNPT Piston Liquid Flow Switch, 0.25 gpm
  • GEMS SENSORS
  • 1/4 FNPT Piston Liquid Flow Switch, 0.25 gpm 1/4 FNPT Piston Liquid Flow Switch, 0.25 gpm
  • Item # 1ALG9
  • Mfr. Model # FS-927 70827
  • Liquid Flow Switch, Piston, Flow Rate 0.25 GPM, Connection Size (In.) 1/4 FNPT, Min. Ambient Temp. -20 F,...More

9/16-18 UNF Piston Liquid Flow Switch, 1 gpm
  • GEMS SENSORS
  • 9/16-18 UNF Piston Liquid Flow Switch, 1 gpm 9/16-18 UNF Piston Liquid Flow Switch, 1 gpm
  • Item # 1ALD3
  • Mfr. Model # FS-4 122356
  • Liquid Flow Switch, Piston, Flow Rate 1 GPM, Connection Size (In.) 9/16-18 UNF, Max. Ambient Temp. 225 F,...More

Results per page:  16 | 32 | 48
Note: Product availability is real-time basis and adjusted continuously. The product will be reserved for you when you complete your order. More